1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright 2020 Martin Blumenstingl <martin.blumenstingl@googlemail.com> */ 3 4 #ifndef __LIMA_DEVFREQ_H__ 5 #define __LIMA_DEVFREQ_H__ 6 7 #include <linux/devfreq.h> 8 #include <linux/spinlock.h> 9 #include <linux/ktime.h> 10 11 struct devfreq; 12 struct thermal_cooling_device; 13 14 struct lima_device; 15 16 struct lima_devfreq { 17 struct devfreq *devfreq; 18 struct thermal_cooling_device *cooling; 19 struct devfreq_simple_ondemand_data gov_data; 20 21 ktime_t busy_time; 22 ktime_t idle_time; 23 ktime_t time_last_update; 24 int busy_count; 25 /* 26 * Protect busy_time, idle_time, time_last_update and busy_count 27 * because these can be updated concurrently, for example by the GP 28 * and PP interrupts. 29 */ 30 spinlock_t lock; 31 }; 32 33 int lima_devfreq_init(struct lima_device *ldev); 34 void lima_devfreq_fini(struct lima_device *ldev); 35 36 void lima_devfreq_record_busy(struct lima_devfreq *devfreq); 37 void lima_devfreq_record_idle(struct lima_devfreq *devfreq); 38 39 int lima_devfreq_resume(struct lima_devfreq *devfreq); 40 int lima_devfreq_suspend(struct lima_devfreq *devfreq); 41 42 #endif 43